Chemical Bonding And Molecular Structure Question 293
Question: Two elements X and Y have following electronic Configurations
$ X:1s^{2},2s^{2},2p^{2},3s^{2},3p^{6}4s^{2} $ $ Y:1s^{2},2s^{2},2p^{6},3s^{2},3p^{5} $ The expected compound formed by combination of X and Y will be expressed as
Options:
A) $ XY_2 $
B) $ X_5Y_2 $
C) $ X_2Y_5 $
D) $ {X_{{}}}Y_5 $
Show Answer
Answer:
Correct Answer: A
Solution:
- Valency of element X is 2 (electrons in the outermost shell) while that of element Y is 1 (electron required in the outermost shell to complete octet). So, the formula of the compound between X and Y is $ XY_2 $
